/* roulang page: index */
:root{
  --brand:#1F5FA9;--brand-d:#143F73;--brand-dd:#10243B;--brand-l:#E8F0FB;
  --accent:#E2703A;--accent-d:#C85C2A;--accent-l:#FBEDE4;
  --support:#2E8B7A;--support-l:#E3F2EF;
  --bg:#F5F7FA;--surface:#FFFFFF;--surface-2:#EEF2F7;
  --ink:#141C26;--ink-2:#4A5568;--ink-3:#8A94A3;--line:#DDE4EC;
  --sh-1:0 1px 2px rgba(20,45,80,.06);
  --sh-2:0 8px 24px rgba(20,45,80,.08);
  --sh-3:0 16px 40px rgba(20,45,80,.12);
  --r-card:14px;--r-btn:10px;--r-img:12px;--r-chip:999px;
  --t:.22s ease;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  font-size:16px;line-height:1.85;letter-spacing:0;
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:var(--brand);text-decoration:none;transition:color var(--t)}
a:hover{color:var(--brand-d)}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:-.01em}
h1{font-size:clamp(30px,3.4vw,44px);line-height:1.25}
h2{font-size:clamp(24px,2.4vw,32px);line-height:1.3}
h3{font-size:20px;line-height:1.4;font-weight:600}
h4{font-size:17px;line-height:1.5;font-weight:600}
p{margin:0 0 18px;font-size:16px;line-height:1.85;color:var(--ink-2);max-width:760px}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}
input{font:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section--tight{padding:72px 0}
.section--alt{background:var(--surface-2)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px}
.section-head .lead{color:var(--ink-3);font-size:14px;line-height:1.7;margin:8px 0 0}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;line-height:1.6;
  color:var(--brand);font-weight:600;letter-spacing:.04em;margin-bottom:14px;
}
.eyebrow::before{content:"";width:3px;height:14px;background:var(--brand);border-radius:2px;display:block}
.textlink{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand)}
.textlink svg{transition:transform var(--t)}
.textlink:hover svg{transform:translateX(3px)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--r-btn);font-size:15px;font-weight:600;
  transition:transform var(--t),box-shadow var(--t),background-color var(--t),color var(--t),border-color var(--t);
  white-space:nowrap;
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--accent-d);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:none;box-shadow:var(--sh-1)}
.btn-ghost{background:transparent;color:var(--brand);border:1px solid var(--brand)}
.btn-ghost:hover{background:var(--brand-l);color:var(--brand-d);transform:translateY(-1px)}
.btn-ghost:active{transform:none}
.btn-light{background:#fff;color:var(--brand-d);box-shadow:var(--sh-2)}
.btn-light:hover{background:var(--brand-l);color:var(--brand-d);transform:translateY(-1px)}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none}
.chip{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-chip);
  font-size:13px;line-height:1.6;background:var(--brand-l);color:var(--brand);font-weight:600;
}
.chip--support{background:var(--support-l);color:#1E6A5C}
.chip--accent{background:var(--accent-l);color:#A8461C}
.meta{font-size:13px;line-height:1.6;color:var(--ink-3)}

/* top bar */
.topbar{background:var(--surface-2);font-size:13px;line-height:1.6;color:var(--ink-3);border-bottom:1px solid var(--line)}
.topbar .container{display:flex;align-items:center;justify-content:space-between;min-height:36px;gap:16px}
.topbar-links{display:flex;gap:18px}
.topbar-links a{color:var(--ink-2);font-size:13px}
.topbar-links a:hover{color:var(--brand)}

/* header */
.site-header{position:sticky;top:0;z-index:60;background:var(--surface);border-bottom:1px solid var(--line);transition:box-shadow var(--t)}
.site-header.is-scrolled{box-shadow:var(--sh-2)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:72px}
.brand{display:flex;align-items:center;gap:12px;color:var(--ink)}
.brand-mark{
  width:34px;height:34px;border-radius:9px;background:var(--brand);position:relative;flex:0 0 auto;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.18);
}
.brand-mark::before{content:"";position:absolute;inset:10px 10px 18px 10px;background:#fff;border-radius:2px}
.brand-mark::after{content:"";position:absolute;left:10px;right:16px;bottom:10px;height:4px;background:var(--accent);border-radius:2px}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-name{font-size:17px;font-weight:700;letter-spacing:-.01em;color:var(--ink)}
.brand-sub{font-size:12px;color:var(--ink-3);letter-spacing:.06em}
.nav{display:flex;align-items:center;gap:6px;background:var(--surface-2);padding:5px;border-radius:12px}
.nav a{
  display:inline-flex;align-items:center;height:36px;padding:0 14px;border-radius:9px;
  font-size:14px;font-weight:600;color:var(--ink-2);position:relative;transition:background-color var(--t),color var(--t);
}
.nav a:hover{background:#fff;color:var(--brand)}
.nav a.is-active{background:var(--brand-l);color:var(--brand)}
.nav a.is-active::after{content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;background:var(--brand);border-radius:2px}
.header-cta{display:flex;align-items:center;gap:12px}
.burger{
  display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:var(--r-btn);
  align-items:center;justify-content:center;background:#fff;transition:border-color var(--t),background-color var(--t);
}
.burger:hover{border-color:var(--brand);background:var(--brand-l)}
.burger span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;position:relative}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px}
.burger span::before{top:-6px}.burger span::after{top:6px}

/* drawer */
.drawer{
  position:fixed;inset:0 0 0 auto;width:min(320px,86vw);background:var(--surface);
  transform:translateX(102%);transition:transform .26s ease;z-index:80;box-shadow:var(--sh-3);
  padding:20px;display:flex;flex-direction:column;gap:18px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-close{width:38px;height:38px;border:1px solid var(--line);border-radius:var(--r-btn);display:flex;align-items:center;justify-content:center}
.drawer-close:hover{border-color:var(--brand);color:var(--brand)}
.drawer-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.drawer-grid a{
  display:flex;align-items:center;justify-content:center;height:44px;border-radius:var(--r-btn);
  background:var(--surface-2);color:var(--ink-2);font-size:14px;font-weight:600;
}
.drawer-grid a:hover,.drawer-grid a.is-active{background:var(--brand-l);color:var(--brand)}
.overlay{position:fixed;inset:0;background:rgba(16,36,59,.45);opacity:0;visibility:hidden;transition:opacity var(--t);z-index:70}
.overlay.is-open{opacity:1;visibility:visible}

/* hero */
.hero{
  background:linear-gradient(180deg,#F7FAFD 0%,#FFFFFF 100%);
  position:relative;overflow:hidden;padding:76px 0 88px;
}
.hero::after{
  content:"";position:absolute;right:-120px;bottom:-140px;width:420px;height:420px;
  background:repeating-linear-gradient(45deg,rgba(31,95,169,.07) 0 2px,transparent 2px 14px);
  transform:rotate(12deg);pointer-events:none;
}
.hero-grid{display:grid;grid-template-columns:58fr 42fr;gap:48px;align-items:center;position:relative;z-index:1}
.hero-title{margin:0 0 18px}
.hero-sub{font-size:17px;line-height:1.8;color:var(--ink-2);max-width:560px;margin-bottom:26px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px}
.trust-row{display:flex;flex-wrap:wrap;gap:26px}
.trust-item{display:flex;align-items:center;gap:9px;font-size:14px;color:var(--ink-2);font-weight:500}
.trust-item svg{flex:0 0 auto}
.hero-visual{position:relative}
.hero-visual img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-card);box-shadow:var(--sh-3)}
.float-card{
  position:absolute;left:-22px;bottom:-26px;background:#fff;border-radius:var(--r-card);
  padding:16px 18px;box-shadow:var(--sh-3);border:1px solid var(--line);min-width:186px;
}
.float-card .num{font-size:26px;font-weight:700;color:var(--brand);line-height:1.2}
.float-card .label{font-size:13px;color:var(--ink-3);line-height:1.6}

/* feature asymmetric */
.feature-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:24px;align-items:stretch}
.card{
  position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);transition:box-shadow var(--t),transform var(--t);overflow:hidden;
}
.card::before{content:"";position:absolute;left:0;right:0;top:0;height:2px;background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform var(--t)}
.card:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.card:hover::before{transform:scaleX(1)}
.feature-main{padding:0;display:flex;flex-direction:column}
.feature-main img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:0}
.feature-main .body{padding:26px 28px 30px}
.feature-main h3{margin:14px 0 12px;font-size:22px}
.feature-list{display:grid;gap:10px;margin-top:6px}
.feature-list li{position:relative;padding-left:20px;font-size:14px;line-height:1.75;color:var(--ink-2)}
.feature-list li::before{content:"";position:absolute;left:0;top:11px;width:8px;height:8px;border:2px solid var(--brand);border-radius:2px}
.feature-side{display:grid;grid-template-rows:1fr 1fr;gap:24px}
.feature-side .card{padding:26px 26px 28px;display:flex;flex-direction:column;gap:12px}
.icon-box{
  width:44px;height:44px;border-radius:11px;background:var(--brand-l);display:flex;align-items:center;justify-content:center;color:var(--brand)
}
.serial{font-size:13px;font-weight:700;color:var(--accent);letter-spacing:.08em}
.feature-side p{margin:0;font-size:14px;line-height:1.75}

/* steps */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split--reverse .split-media{order:-1}
.step-list{position:relative;margin-top:26px}
.step{position:relative;padding:0 0 28px 62px;transition:background-color var(--t)}
.step:last-child{padding-bottom:0}
.step::before{
  content:"";position:absolute;left:21px;top:38px;bottom:2px;width:1px;background:var(--line);
}
.step:last-child::before{display:none}
.step-num{
  position:absolute;left:0;top:0;width:44px;height:44px;border-radius:11px;background:var(--surface-2);
  display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;color:var(--ink-3);
  transition:background-color var(--t),color var(--t);
}
.step h4{margin-bottom:6px;font-size:17px;transition:color var(--t)}
.step p{margin:0;font-size:14px;line-height:1.75;color:var(--ink-2)}
.step.is-active .step-num{background:var(--brand);color:#fff}
.step.is-active h4{color:var(--brand)}
.split-media img{width:100%;aspect-ratio:3/2;object-fit:cover;border-radius:var(--r-card);box-shadow:var(--sh-2)}

/* cms list */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post-card{display:flex;flex-direction:column;padding:0;overflow:hidden}
.post-card .thumb{overflow:hidden;border-radius:var(--r-img);margin:0}
.post-card .thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-img);transition:transform var(--t)}
.post-card:hover .thumb img{transform:translateY(-2px)}
.post-card .body{padding:18px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-card .row{display:flex;align-items:center;gap:12px}
.post-card h3{font-size:19px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color var(--t)}
.post-card:hover h3{color:var(--brand)}
.post-card .excerpt{font-size:14px;line-height:1.75;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;margin:0}
.post-card .foot{margin-top:auto;padding-top:8px}
.post-wide{grid-column:span 3;display:grid;grid-template-columns:1fr 1fr;align-items:stretch}
.post-wide .thumb{margin:0;height:100%}
.post-wide .thumb img{height:100%;aspect-ratio:auto;min-height:240px;border-radius:0}
.post-wide .body{padding:28px 30px}
.post-wide h3{font-size:22px}
.empty-state{
  grid-column:1/-1;background:var(--surface);border:1px dashed var(--line);border-radius:var(--r-card);
  padding:56px 24px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:14px;
}
.empty-state p{margin:0;font-size:14px;color:var(--ink-3)}
.skeleton{background:var(--surface-2);position:relative;overflow:hidden;border-radius:var(--r-img)}
.skeleton::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.75),transparent);
  animation:sweep 1.4s infinite;
}
@keyframes sweep{0%{transform:translateX(-100%)}100%{transform:translateX(100%)}}

/* proof */
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--sh-1);overflow:hidden;margin-bottom:32px;
}
.stat{padding:28px 24px;text-align:center;border-right:1px solid var(--line)}
.stat:last-child{border-right:none}
.stat .num{font-size:32px;font-weight:700;color:var(--brand);line-height:1.2}
.stat .txt{font-size:13px;color:var(--ink-3);line-height:1.7;margin-top:6px}
.quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start}
.quote{padding:26px;display:flex;flex-direction:column;gap:14px}
.quote:nth-child(2){margin-top:26px}
.quote:nth-child(3){margin-top:12px}
.quote .mark{font-size:34px;line-height:1;color:var(--brand-l);font-weight:700}
.quote p{margin:0;font-size:15px;line-height:1.8;color:var(--ink-2)}
.quote .who{font-size:13px;color:var(--ink-3);line-height:1.6}
.logo-strip{
  margin-top:32px;display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  padding:22px 26px;background:var(--surface-2);border-radius:var(--r-card);border:1px solid var(--line);
}
.logo-strip span{
  font-size:14px;font-weight:600;color:var(--ink-3);letter-spacing:.08em;
  filter:grayscale(1);opacity:.8;
}

/* faq */
.faq{border-top:1px solid var(--line);max-width:900px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 4px 20px 0;text-align:left;font-size:17px;font-weight:600;color:var(--ink);
  position:relative;transition:color var(--t);
}
.faq-q::before{content:"";position:absolute;left:-14px;top:18px;bottom:18px;width:3px;background:var(--brand);border-radius:2px;opacity:0;transition:opacity var(--t)}
.faq-q:hover{color:var(--brand)}
.faq-item.is-open .faq-q{color:var(--brand)}
.faq-item.is-open .faq-q::before{opacity:1}
.faq-q svg{flex:0 0 auto;transition:transform var(--t)}
.faq-item.is-open .faq-q svg{transform:rotate(180deg)}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .26s ease;
  background:var(--surface-2);border-radius:0 0 var(--r-card) var(--r-card);
}
.faq-a p{margin:0;padding:16px 20px;font-size:15px;line-height:1.8;color:var(--ink-2)}

/* cta */
.cta-band{
  background:var(--brand-d);border-radius:16px;padding:56px 40px;text-align:center;color:#fff;
  box-shadow:var(--sh-3);
}
.cta-band h2{color:#fff;margin-bottom:12px}
.cta-band p{color:rgba(255,255,255,.82);margin:0 auto 26px;max-width:600px;font-size:15px}
.cta-band .btn-primary:hover{background:#fff;color:var(--brand-d)}

/* footer */
.site-footer{background:var(--brand-dd);color:rgba(255,255,255,.72);padding:64px 0 0;margin-top:96px}
.footer-grid{display:grid;grid-template-columns:1.4fr .8fr .8fr 1fr;gap:40px;padding-bottom:44px}
.site-footer h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px}
.site-footer a{color:rgba(255,255,255,.72);font-size:14px;line-height:1.9;display:inline-block;transition:color var(--t),transform var(--t)}
.site-footer a:hover{color:#fff;transform:translateX(2px)}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-brand .brand-mark{background:rgba(255,255,255,.14)}
.footer-brand .brand-name{color:#fff;font-size:17px;font-weight:700}
.footer-brand .brand-sub{color:rgba(255,255,255,.5)}
.footer-about p{color:rgba(255,255,255,.66);font-size:14px;line-height:1.8;margin:0 0 14px;max-width:340px}
.footer-contact{font-size:14px;line-height:1.9;color:rgba(255,255,255,.66)}
.footer-links{display:grid;gap:4px}
.sub-form{display:flex;flex-direction:column;gap:14px;max-width:280px}
.sub-form input{
  height:48px;border-radius:var(--r-btn);border:1px solid rgba(255,255,255,.24);
  background:rgba(255,255,255,.06);color:#fff;padding:0 14px;font-size:14px;transition:border-color var(--t),box-shadow var(--t)
}
.sub-form input::placeholder{color:rgba(255,255,255,.45)}
.sub-form input:focus{outline:none;border-color:#7FB0E4;box-shadow:0 0 0 3px rgba(127,176,228,.18)}
.sub-form .btn{width:100%}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:20px 0 26px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.55);
}

/* floating bar */
.convert-bar{
  position:fixed;right:24px;bottom:24px;z-index:55;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--sh-3);padding:14px 16px;
  display:flex;align-items:center;gap:16px;opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity var(--t),transform var(--t),visibility var(--t);
}
.convert-bar.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.convert-bar .txt{font-size:14px;font-weight:600;color:var(--ink)}
.convert-bar .sub{font-size:12px;color:var(--ink-3);line-height:1.6}
.convert-bar .btn{padding:10px 18px;font-size:14px}

@media (max-width:1279px){
  .container{max-width:960px}
  .post-grid{grid-template-columns:repeat(2,1fr)}
  .post-wide{grid-column:span 2;grid-template-columns:1fr}
  .post-wide .thumb img{min-height:200px;aspect-ratio:16/9;border-radius:var(--r-img) var(--r-img) 0 0}
}
@media (max-width:1100px){
  .nav{display:none}
  .burger{display:flex}
  .header-cta .btn{display:none}
}
@media (max-width:991px){
  .section{padding:72px 0}
  .hero{padding:56px 0 72px}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-visual{order:-1}
  .float-card{position:static;margin-top:16px;left:auto;bottom:auto;min-width:0}
  .feature-grid{grid-template-columns:1fr}
  .split{grid-template-columns:1fr;gap:32px}
  .split--reverse .split-media{order:0}
  .stats{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(2){border-right:none}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line)}
  .quote-grid{grid-template-columns:1fr}
  .quote:nth-child(2),.quote:nth-child(3){margin-top:0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .section{padding:56px 0}
  .topbar .container{font-size:12px}
  .topbar-links{display:none}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px}
  .post-grid{grid-template-columns:1fr}
  .post-wide{grid-column:span 1}
  h1{font-size:clamp(26px,7vw,34px)}
  h2{font-size:clamp(21px,5.4vw,26px)}
  .hero-actions .btn{width:100%}
  .trust-row{gap:16px}
  .cta-band{padding:40px 22px}
  .footer-grid{grid-template-columns:1fr}
  .convert-bar{
    left:0;right:0;bottom:0;border-radius:0;border-left:none;border-right:none;border-bottom:none;
    padding:10px 16px calc(10px + env(safe-area-inset-bottom));justify-content:space-between;gap:12px;
  }
  .convert-bar .sub{display:none}
}
@media (max-width:480px){
  body{font-size:15px}
  p{font-size:15px}
  .hero-sub{font-size:15px}
  .stat .num{font-size:26px}
  .btn{padding:11px 18px}
}

/* roulang page: article */
:root{
  --brand:#1F5FA9;
  --brand-d:#143F73;
  --brand-l:#E8F0FB;
  --accent:#E2703A;
  --accent-l:#FBEDE5;
  --support:#2E8B7A;
  --support-l:#E6F3F0;
  --bg:#F5F7FA;
  --surface:#FFFFFF;
  --surface-2:#EEF2F7;
  --ink:#141C26;
  --ink-2:#4A5568;
  --ink-3:#8A94A3;
  --line:#DDE4EC;
  --dark:#10243B;
  --sh-1:0 1px 2px rgba(20,45,80,.06);
  --sh-2:0 8px 24px rgba(20,45,80,.08);
  --sh-3:0 16px 40px rgba(20,45,80,.12);
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--font);font-size:16px;line-height:1.85;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%;height:auto}
a{color:var(--brand);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--brand-d)}
button{font-family:inherit;font-size:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3;letter-spacing:-.01em;color:var(--ink)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.tnum{font-variant-numeric:tabular-nums}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section-sm{padding:64px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px}
.section-head h2{font-size:clamp(24px,2.4vw,32px);position:relative;padding-left:14px}
.section-head h2::before{content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:3px;background:var(--brand);border-radius:2px}
.section-sub{margin-top:8px;font-size:14px;color:var(--ink-3);line-height:1.7}

/* header */
.topbar{background:var(--surface-2);border-bottom:1px solid var(--line);font-size:13px;color:var(--ink-3)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:36px}
.topbar-links{display:flex;gap:18px;flex:0 0 auto}
.topbar-links a{font-size:13px;color:var(--ink-2)}
.topbar-links a:hover{color:var(--brand)}
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .22s ease}
.site-header.is-scrolled{box-shadow:var(--sh-2)}
.header-inner{display:flex;align-items:center;gap:20px;min-height:70px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{position:relative;width:32px;height:32px;border-radius:9px;background:var(--brand);flex:0 0 auto}
.brand-mark::after{content:"";position:absolute;left:10px;top:10px;width:12px;height:12px;border-radius:3px;background:#fff}
.brand-text{display:flex;flex-direction:column}
.brand-name{font-size:18px;font-weight:700;color:var(--ink);line-height:1.25;letter-spacing:-.01em}
.brand-sub{font-size:12px;color:var(--ink-3);line-height:1.35}
.nav{display:flex;flex:1 1 auto;justify-content:center;gap:4px;min-width:0}
.nav a{position:relative;display:inline-flex;align-items:center;padding:8px 14px;border-radius:var(--r-pill);font-size:14px;color:var(--ink-2);background:var(--surface-2);transition:background .2s ease,color .2s ease}
.nav a:hover{background:var(--brand-l);color:var(--brand)}
.nav a.is-active{background:var(--brand-l);color:var(--brand);font-weight:600}
.nav a.is-active::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;background:var(--brand)}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.nav-toggle{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:var(--r-btn);background:#fff;cursor:pointer;position:relative}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{position:absolute;left:50%;width:18px;height:2px;background:var(--ink);border-radius:2px;transform:translateX(-50%);transition:transform .2s ease,opacity .2s ease}
.nav-toggle span{top:50%;margin-top:-1px}
.nav-toggle span::before{content:"";left:0;top:-6px;transform:none}
.nav-toggle span::after{content:"";left:0;top:6px;transform:none}
.nav-toggle.is-open span{background:transparent}
.nav-toggle.is-open span::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle.is-open span::after{transform:translateY(-6px) rotate(-45deg)}
.mobile-drawer{position:fixed;top:0;right:0;bottom:0;width:280px;max-width:86vw;background:#fff;border-left:1px solid var(--line);box-shadow:var(--sh-3);transform:translateX(102%);transition:transform .24s ease;z-index:80;padding:80px 20px 24px;overflow-y:auto}
.mobile-drawer.is-open{transform:translateX(0)}
.mobile-drawer .drawer-title{font-size:13px;color:var(--ink-3);margin-bottom:12px}
.mobile-drawer nav{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.mobile-drawer nav a{display:block;padding:10px 12px;border-radius:var(--r-btn);background:var(--surface-2);font-size:14px;color:var(--ink-2);text-align:center}
.mobile-drawer nav a.is-active{background:var(--brand-l);color:var(--brand);font-weight:600}
.mobile-drawer .drawer-cta{margin-top:20px}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border-radius:var(--r-btn);border:1px solid transparent;font-size:15px;font-weight:600;cursor:pointer;transition:background .2s ease,color .2s ease,box-shadow .2s ease,transform .2s ease,border-color .2s ease}
.btn:active{transform:translateY(0)}
.btn:disabled,.btn.is-disabled{opacity:.4;cursor:not-allowed}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:#c95f2d;color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-secondary{background:transparent;border-color:var(--brand);color:var(--brand)}
.btn-secondary:hover{background:var(--brand-l);color:var(--brand-d)}
.btn-light{background:#fff;color:var(--brand-d)}
.btn-light:hover{background:#EAF1FA;color:var(--brand-d);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-sm{padding:9px 16px;font-size:14px}
.btn-block{width:100%}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand)}
.link-more .arrow{transition:transform .2s ease;display:inline-block}
.link-more:hover .arrow{transform:translateX(3px)}

/* chips & badges */
.chip{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);background:var(--brand-l);color:var(--brand);font-size:13px;font-weight:600;line-height:1}
.badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-pill);background:var(--support-l);color:#1F6558;font-size:13px;line-height:1}
.badge-accent{background:var(--accent-l);color:#9C4A1E}

/* breadcrumb */
.breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:6px;font-size:13px;color:var(--ink-3);line-height:1.6;padding:20px 0 0}
.breadcrumb a{color:var(--ink-2)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:var(--ink-3)}
.breadcrumb .current{max-width:60ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--ink-3)}

/* article head */
.article-head{background:var(--surface-2);border-bottom:1px solid var(--line);padding-bottom:36px}
.article-head-inner{max-width:880px;padding-top:18px}
.article-head h1{font-size:clamp(28px,3.2vw,42px);margin-top:14px;line-height:1.25;letter-spacing:-.01em}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:16px;font-size:13px;color:var(--ink-3);line-height:1.6}
.article-meta .dot{color:var(--line)}

/* glance strip */
.glance{background:var(--dark);color:#fff}
.glance-inner{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;background:rgba(255,255,255,.12)}
.glance-item{background:var(--dark);padding:20px 22px}
.glance-label{display:block;font-size:13px;color:rgba(255,255,255,.62);line-height:1.6}
.glance-value{display:block;margin-top:6px;font-size:16px;font-weight:600;color:#fff;line-height:1.5;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* layout */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:40px;padding:56px 0 0}
.article-main{min-width:0}
.article-body{max-width:760px;font-size:16px;line-height:1.85;color:var(--ink-2)}
.article-body>*+*{margin-top:18px}
.article-body h2{font-size:clamp(21px,2vw,26px);color:var(--ink);margin-top:32px;margin-bottom:16px;position:relative;padding-left:14px}
.article-body h2::before{content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:3px;background:var(--brand);border-radius:2px}
.article-body h3{font-size:19px;color:var(--ink);margin-top:28px;margin-bottom:12px}
.article-body h4{font-size:17px;color:var(--ink);margin-top:22px;margin-bottom:10px}
.article-body p{color:var(--ink-2)}
.article-body ul,.article-body ol{padding-left:22px;list-style:disc;color:var(--ink-2)}
.article-body ol{list-style:decimal}
.article-body li+li{margin-top:8px}
.article-body li::marker{color:var(--brand)}
.article-body blockquote{margin:24px 0;padding:16px 20px;border-left:3px solid var(--brand);background:var(--brand-l);border-radius:0 var(--r-btn) var(--r-btn) 0;color:var(--ink-2)}
.article-body blockquote p{margin:0}
.article-body img{border-radius:var(--r-img);margin:24px auto;box-shadow:var(--sh-1)}
.article-body figure{margin:24px 0}
.article-body figcaption{margin-top:10px;font-size:13px;color:var(--ink-3);text-align:center}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--brand-d)}
.article-body table{width:100%;margin:24px 0;font-size:15px;border:1px solid var(--line);border-radius:var(--r-btn);overflow:hidden}
.article-body th,.article-body td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--line)}
.article-body th{background:var(--surface-2);font-weight:600;color:var(--ink)}
.article-body tr:last-child td{border-bottom:0}
.article-body pre{margin:24px 0;padding:18px 20px;background:var(--surface-2);border:1px solid var(--line);border-radius:var(--r-img);overflow-x:auto;font-size:14px;line-height:1.7}
.article-body code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14px;background:var(--surface-2);padding:2px 6px;border-radius:6px;color:var(--brand-d)}
.article-body pre code{background:none;padding:0;color:var(--ink-2)}
.article-body hr{border:0;border-top:1px solid var(--line);margin:32px 0}

/* toc */
.article-aside{display:none}
.toc{position:sticky;top:104px;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-1);padding:20px}
.toc h4{font-size:15px;margin-bottom:12px;color:var(--ink)}
.toc nav{display:flex;flex-direction:column}
.toc nav a{display:block;padding:8px 10px;border-left:2px solid transparent;font-size:14px;color:var(--ink-2);line-height:1.6;border-radius:0 8px 8px 0}
.toc nav a:hover{background:var(--surface-2);color:var(--brand)}
.toc nav a.is-current{border-left-color:var(--brand);background:var(--brand-l);color:var(--brand);font-weight:600}

/* article foot */
.article-foot{max-width:760px;margin-top:40px;padding-top:28px;border-top:1px solid var(--line)}
.tag-row{display:flex;flex-wrap:wrap;gap:8px}
.tag-row a{display:inline-flex;align-items:center;height:28px;padding:0 14px;border-radius:var(--r-pill);background:var(--surface-2);color:var(--ink-2);font-size:13px}
.tag-row a:hover{background:var(--brand-l);color:var(--brand)}
.share-row{display:flex;align-items:center;gap:10px;margin-top:20px;font-size:13px;color:var(--ink-3)}
.icon-btn{width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:#fff;color:var(--ink-2);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;transition:border-color .2s ease,color .2s ease,box-shadow .2s ease}
.icon-btn:hover{border-color:var(--brand);color:var(--brand);box-shadow:var(--sh-1)}
.article-back{margin-top:26px}

/* empty state */
.empty-state{max-width:640px;margin:0 auto;padding:52px 24px;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-1);text-align:center}
.empty-state .icon{width:56px;height:56px;margin:0 auto 18px;border-radius:16px;background:var(--surface-2);display:flex;align-items:center;justify-content:center;color:var(--ink-3)}
.empty-state h3{font-size:20px;margin-bottom:10px}
.empty-state p{color:var(--ink-2);margin-bottom:22px}

/* cards */
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-1);padding:22px;transition:box-shadow .2s ease,transform .2s ease}
.card:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.entry-card{display:flex;flex-direction:column;overflow:hidden;padding:0}
.entry-card .thumb{aspect-ratio:16/9;background:var(--surface-2);overflow:hidden}
.entry-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .24s ease}
.entry-card:hover .thumb img{transform:scale(1.03)}
.entry-card .entry-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px}
.entry-card h3{font-size:18px;line-height:1.5}
.entry-card p{font-size:14px;color:var(--ink-2);line-height:1.75}

/* faq */
.faq{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-1);overflow:hidden}
.faq-item+.faq-item{border-top:1px solid var(--line)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:20px 24px;background:none;border:0;text-align:left;font-size:17px;font-weight:600;color:var(--ink);cursor:pointer;position:relative;transition:background .2s ease}
.faq-q::before{content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;background:var(--brand);border-radius:2px;opacity:0;transition:opacity .2s ease}
.faq-q:hover{background:var(--surface-2)}
.faq-q .caret{flex:0 0 auto;width:18px;height:18px;color:var(--ink-3);transition:transform .22s ease,color .22s ease}
.faq-item.is-open .faq-q::before{opacity:1}
.faq-item.is-open .faq-q .caret{transform:rotate(180deg);color:var(--brand)}
.faq-a{display:none;padding:0 24px 22px 24px;background:var(--surface-2);color:var(--ink-2);font-size:15px;line-height:1.85}
.faq-item.is-open .faq-a{display:block}
.faq-a p+p{margin-top:12px}

/* cta */
.cta-band{padding:0 0 88px}
.cta-inner{background:var(--brand-d);color:#fff;border-radius:16px;padding:56px 40px;text-align:center;box-shadow:var(--sh-3)}
.cta-inner h2{color:#fff;font-size:clamp(23px,2.4vw,30px)}
.cta-inner p{margin:14px auto 26px;max-width:620px;color:rgba(255,255,255,.78);font-size:15px;line-height:1.8}

/* footer */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);padding:64px 0 0;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{width:30px;height:30px;border-radius:8px;background:var(--brand)}
.footer-brand .brand-mark::after{left:9px;top:9px;width:12px;height:12px}
.footer-brand .brand-name{color:#fff;font-size:17px}
.footer-brand .brand-sub{color:rgba(255,255,255,.5)}
.footer-about p{max-width:340px;line-height:1.85;color:rgba(255,255,255,.68)}
.footer-contact{margin-top:16px;font-size:13px;line-height:1.9;color:rgba(255,255,255,.5)}
.site-footer h4{font-size:15px;color:#fff;margin-bottom:16px;font-weight:600}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{color:rgba(255,255,255,.68);font-size:14px;transition:color .2s ease,transform .2s ease}
.footer-links a:hover{color:#fff;transform:translateX(2px)}
.sub-form{display:flex;flex-direction:column;gap:12px}
.sub-form label{font-size:13px;color:rgba(255,255,255,.6);line-height:1.7}
.sub-form input{height:48px;padding:0 14px;border-radius:var(--r-btn);border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.06);color:#fff;font-size:14px;transition:border-color .2s ease,box-shadow .2s ease}
.sub-form input::placeholder{color:rgba(255,255,255,.42)}
.sub-form input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(31,95,169,.35)}
.footer-bottom{margin-top:48px;padding:20px 0;border-top:1px solid rgba(255,255,255,.14);display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:13px;color:rgba(255,255,255,.5)}

/* float bar */
.float-bar{position:fixed;right:24px;bottom:24px;z-index:70;display:flex;align-items:center;gap:16px;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-3);padding:14px 16px;opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity .24s ease,transform .24s ease,visibility .24s ease;max-width:520px}
.float-bar.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.float-bar-text{font-size:14px;color:var(--ink-2);line-height:1.6}
.sub-form{display:flex;flex-direction:column}
@media (min-width:1200px){
  .article-layout{grid-template-columns:minmax(0,860px) 250px;justify-content:center;gap:48px}
  .article-aside.is-ready{display:block}
}
@media (max-width:1279px){
  .header-inner{gap:14px}
  .nav a{padding:8px 11px;font-size:13px}
  .glance-inner{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:991px){
  .section{padding:72px 0}
  .nav{display:none}
  .nav-toggle{display:block}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta-inner{padding:44px 24px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .section{padding:56px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px}
  .topbar-inner{justify-content:center}
  .topbar-note{display:none}
  .header-inner{min-height:62px;gap:10px}
  .brand-name{font-size:16px}
  .brand-sub{display:none}
  .grid-3{grid-template-columns:1fr}
  .glance-inner{grid-template-columns:1fr}
  .article-layout{padding-top:36px}
  .article-body{max-width:100%}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .float-bar{left:0;right:0;bottom:0;max-width:none;border-radius:0;border-left:0;border-right:0;border-bottom:0;padding:10px 16px calc(10px + env(safe-area-inset-bottom));justify-content:space-between;gap:12px}
  .float-bar-text{font-size:13px}
}
@media (max-width:520px){
  body{font-size:15px}
  .article-head h1{font-size:26px}
  .btn{padding:11px 18px;font-size:14px}
  .cta-inner{padding:36px 18px;border-radius:14px}
  .faq-q{padding:16px 18px;font-size:16px}
  .faq-a{padding:0 18px 18px}
}

/* roulang page: category1 */
/* ============ 设计变量 ============ */
:root{
  --brand:#1F5FA9;
  --brand-d:#143F73;
  --brand-l:#E8F0FB;
  --accent:#E2703A;
  --accent-l:#FBEDE5;
  --support:#2E8B7A;
  --support-l:#E3F2EE;
  --bg:#F5F7FA;
  --surface:#FFFFFF;
  --surface-2:#EEF2F7;
  --ink:#141C26;
  --ink-2:#4A5568;
  --ink-3:#8A94A3;
  --line:#DDE4EC;
  --sh-1:0 1px 2px rgba(20,45,80,.06);
  --sh-2:0 8px 24px rgba(20,45,80,.08);
  --sh-3:0 16px 40px rgba(20,45,80,.12);
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --container:1200px;
  --sec:92px;
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
}

/* ============ 基础重置 ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--bg);
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;}
input,select,textarea{font-family:inherit;font-size:inherit;}
h1,h2,h3,h4,h5{margin:0;font-weight:700;letter-spacing:-.01em;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
table{border-collapse:collapse;width:100%;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
::selection{background:var(--brand-l);color:var(--brand-d);}

/* ============ 布局容器 ============ */
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}
.section{padding:var(--sec) 0;}
.section-tight{padding:64px 0;}
.section-alt{background:var(--surface);}
.grid-12{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;}

/* ============ 排版 ============ */
.h1{font-size:clamp(30px,3.4vw,44px);line-height:1.25;font-weight:700;letter-spacing:-.01em;}
.h2{font-size:clamp(24px,2.4vw,32px);line-height:1.3;font-weight:700;}
.h3{font-size:21px;font-weight:600;line-height:1.4;}
.h4{font-size:17px;font-weight:600;line-height:1.5;}
.lead{font-size:17px;color:var(--ink-2);line-height:1.8;}
.meta{font-size:13px;line-height:1.6;color:var(--ink-3);}
.num{font-variant-numeric:tabular-nums;}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;}
.sec-head-left{max-width:640px;}
.sec-head .h2{position:relative;padding-left:14px;}
.sec-head .h2::before{
  content:"";position:absolute;left:0;top:.16em;bottom:.16em;width:3px;
  background:var(--brand);border-radius:2px;
}
.sec-sub{margin-top:10px;font-size:14px;color:var(--ink-3);line-height:1.7;}

/* ============ 顶部信息条 ============ */
.topbar{
  background:var(--surface-2);
  border-bottom:1px solid var(--line);
  font-size:13px;
  color:var(--ink-3);
  line-height:1.6;
}
.topbar-inner{
  min-height:36px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding-top:6px;
  padding-bottom:6px;
}
.topbar-links{display:flex;gap:18px;flex-shrink:0;}
.topbar-links a{color:var(--ink-2);transition:color .2s ease;}
.topbar-links a:hover{color:var(--brand);}

/* ============ 头部与导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-2);}
.header-inner{
  min-height:72px;
  display:flex;
  align-items:center;
  gap:20px;
  justify-content:space-between;
}
.brand{display:inline-flex;align-items:center;gap:12px;flex-shrink:0;}
.brand-mark{
  width:36px;height:36px;border-radius:9px;flex-shrink:0;
  background:linear-gradient(180deg,var(--brand) 0%,var(--brand-d) 100%);
  position:relative;
}
.brand-mark::after{
  content:"";position:absolute;inset:11px;border:2px solid rgba(255,255,255,.9);
  border-radius:3px;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-name{font-size:17px;font-weight:700;letter-spacing:-.01em;color:var(--ink);}
.brand-sub{font-size:12px;color:var(--ink-3);}

.nav{
  display:flex;
  align-items:center;
  gap:4px;
  padding:4px;
  background:var(--surface-2);
  border-radius:12px;
}
.nav a{
  position:relative;
  display:inline-flex;
  align-items:center;
  padding:8px 14px;
  border-radius:9px;
  font-size:14px;
  font-weight:500;
  color:var(--ink-2);
  white-space:nowrap;
  transition:background .2s ease,color .2s ease,box-shadow .2s ease;
}
.nav a:hover{background:var(--surface);color:var(--brand);box-shadow:var(--sh-1);}
.nav a.is-active{
  background:var(--brand-l);
  color:var(--brand);
  font-weight:600;
  box-shadow:inset 0 -2px 0 var(--brand);
}
.header-cta{flex-shrink:0;}
.nav-toggle{
  display:none;
  width:42px;height:42px;border-radius:10px;
  border:1px solid var(--line);
  background:var(--surface);
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink-2);border-radius:2px;transition:background .2s ease;}
.nav-toggle:hover{border-color:var(--brand);box-shadow:var(--sh-1);}
.nav-toggle:hover span{background:var(--brand);}

/* ============ 移动抽屉 ============ */
.drawer{
  position:fixed;
  top:0;right:0;bottom:0;
  width:min(340px,86vw);
  background:var(--surface);
  box-shadow:var(--sh-3);
  transform:translateX(102%);
  transition:transform .26s ease;
  z-index:90;
  display:flex;flex-direction:column;
  padding:20px;
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;}
.drawer-close{
  width:36px;height:36px;border-radius:9px;border:1px solid var(--line);
  font-size:20px;color:var(--ink-2);line-height:1;
  display:flex;align-items:center;justify-content:center;
  transition:border-color .2s ease,color .2s ease;
}
.drawer-close:hover{border-color:var(--brand);color:var(--brand);}
.drawer-nav{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:20px;}
.drawer-nav a{
  padding:12px 12px;
  border-radius:10px;
  background:var(--surface-2);
  font-size:14px;
  color:var(--ink-2);
  text-align:center;
  transition:background .2s ease,color .2s ease;
}
.drawer-nav a:hover{background:var(--brand-l);color:var(--brand);}
.drawer-nav a.is-active{background:var(--brand-l);color:var(--brand);font-weight:600;box-shadow:inset 0 -2px 0 var(--brand);}
.drawer-cta{width:100%;justify-content:center;}
.drawer-mask{
  position:fixed;inset:0;background:rgba(16,36,59,.42);
  opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s ease;
  z-index:80;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 24px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:600;
  line-height:1.4;
  border:1px solid transparent;
  transition:background .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:var(--sh-1);}
.btn-primary:hover{background:#CE6130;color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-primary:active{transform:translateY(0);box-shadow:var(--sh-1);}
.btn-brand{background:var(--brand);color:#fff;box-shadow:var(--sh-1);}
.btn-brand:hover{background:#1B5497;color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-brand:active{transform:translateY(0);}
.btn-ghost{background:transparent;color:var(--brand);border-color:var(--brand);}
.btn-ghost:hover{background:var(--brand-l);color:var(--brand-d);}
.btn-light{background:#fff;color:var(--brand-d);}
.btn-light:hover{background:#EAF1FA;color:var(--brand-d);transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-light:active{transform:translateY(0);}
.btn-sm{padding:9px 18px;font-size:14px;}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none;}
.link-more{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--brand);
  transition:color .2s ease;
}
.link-more .arrow{transition:transform .2s ease;display:inline-block;}
.link-more:hover{color:var(--brand-d);}
.link-more:hover .arrow{transform:translateX(3px);}

/* ============ 徽章与标签 ============ */
.chip{
  display:inline-flex;align-items:center;
  height:26px;padding:0 12px;border-radius:999px;
  font-size:13px;line-height:1;font-weight:500;
  background:var(--brand-l);color:var(--brand);
}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 12px;border-radius:999px;
  font-size:13px;line-height:1;font-weight:500;
}
.badge-support{background:var(--support-l);color:#1F6B5C;}
.badge-accent{background:var(--accent-l);color:#A84C1F;}
.dot{width:6px;height:6px;border-radius:50%;background:currentColor;display:inline-block;}

/* ============ 页头区 ============ */
.page-head{
  background:var(--surface-2);
  border-bottom:1px solid var(--line);
  padding:44px 0 40px;
  position:relative;
  overflow:hidden;
}
.page-head::after{
  content:"";
  position:absolute;right:-80px;top:-60px;
  width:320px;height:320px;
  border:1px solid rgba(31,95,169,.10);
  border-radius:56px;
  transform:rotate(14deg);
  pointer-events:none;
}
.breadcrumb{
  display:flex;align-items:center;gap:8px;
  font-size:13px;color:var(--ink-3);line-height:1.6;
  margin-bottom:18px;flex-wrap:wrap;
}
.breadcrumb a{color:var(--ink-2);transition:color .2s ease;}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:var(--line);}
.breadcrumb .current{color:var(--ink-3);}
.page-head .h1{max-width:820px;}
.page-head .lead{margin-top:14px;max-width:720px;font-size:16px;color:var(--ink-2);}
.head-stats{
  margin-top:26px;
  display:flex;flex-wrap:wrap;gap:0;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  overflow:hidden;
  max-width:720px;
}
.head-stat{
  flex:1 1 180px;
  padding:16px 20px;
  border-right:1px solid var(--line);
}
.head-stat:last-child{border-right:0;}
.head-stat .k{font-size:13px;color:var(--ink-3);line-height:1.6;}
.head-stat .v{font-size:20px;font-weight:700;color:var(--ink);margin-top:2px;}
.head-stat .v em{font-style:normal;font-size:13px;color:var(--ink-3);font-weight:500;margin-left:4px;}

/* ============ 左文右图 ============ */
.guide-grid{
  display:grid;
  grid-template-columns:minmax(0,1.32fr) minmax(0,1fr);
  gap:52px;
  align-items:start;
}
.prose-block{max-width:760px;}
.prose-block .h3{margin-bottom:12px;}
.prose-block p{color:var(--ink-2);margin-bottom:16px;}
.prose-block p:last-child{margin-bottom:0;}
.prose-block strong{color:var(--ink);font-weight:600;}
.point-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:16px;
  margin-top:32px;
}
.point-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:20px;
  box-shadow:var(--sh-1);
  position:relative;
  transition:box-shadow .22s ease,transform .22s ease,border-color .22s ease;
}
.point-card::before{
  content:"";position:absolute;left:0;right:0;top:0;height:2px;
  background:var(--brand);border-radius:2px 2px 0 0;
  opacity:0;transition:opacity .22s ease;
}
.point-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:#CFDBE8;}
.point-card:hover::before{opacity:1;}
.point-icon{
  width:36px;height:36px;border-radius:9px;
  background:var(--brand-l);color:var(--brand);
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:700;
  margin-bottom:12px;
}
.point-card h4{font-size:16px;font-weight:600;margin-bottom:6px;}
.point-card p{font-size:14px;color:var(--ink-3);line-height:1.7;}

.guide-aside{position:sticky;top:96px;}
.figure{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:14px;
  box-shadow:var(--sh-1);
}
.figure img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  border-radius:var(--r-img);
  background:var(--surface-2);
}
.figure figcaption{
  margin-top:12px;
  font-size:13px;
  color:var(--ink-3);
  line-height:1.6;
}
.aside-list{
  margin-top:18px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:20px;
  box-shadow:var(--sh-1);
}
.aside-list h4{font-size:15px;font-weight:600;margin-bottom:12px;}
.aside-list li{
  display:flex;gap:10px;align-items:flex-start;
  font-size:14px;color:var(--ink-2);line-height:1.7;
  padding:9px 0;
  border-bottom:1px dashed var(--line);
}
.aside-list li:last-child{border-bottom:0;padding-bottom:0;}
.aside-list li .n{
  flex-shrink:0;
  width:22px;height:22px;border-radius:6px;
  background:var(--surface-2);color:var(--brand);
  font-size:12px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
  margin-top:2px;
}

/* ============ 步骤条 ============ */
.steps{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:0;
  position:relative;
  margin-bottom:40px;
}
.step{
  position:relative;
  padding:0 18px;
  text-align:left;
}
.step::before{
  content:"";
  position:absolute;
  top:17px;left:0;right:0;
  height:1px;
  background:var(--line);
}
.step:first-child::before{left:50%;}
.step:last-child::before{right:50%;}
.step:first-child{padding-left:0;}
.step:last-child{padding-right:0;}
.step-dot{
  position:relative;
  width:36px;height:36px;
  border-radius:50%;
  background:var(--surface);
  border:1px solid var(--line);
  color:var(--ink-2);
  font-size:14px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
  margin-bottom:14px;
  transition:background .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.step.is-active .step-dot{
  background:var(--brand);
  border-color:var(--brand);
  color:#fff;
  box-shadow:0 0 0 5px rgba(31,95,169,.12);
}
.step h4{font-size:16px;font-weight:600;margin-bottom:6px;}
.step p{font-size:14px;color:var(--ink-3);line-height:1.7;}

.metric-row{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:16px;
}
.metric-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:22px;
  box-shadow:var(--sh-1);
  transition:box-shadow .22s ease,transform .22s ease;
}
.metric-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);}
.metric-card .v{font-size:30px;font-weight:700;color:var(--brand-d);line-height:1.2;}
.metric-card .v em{font-style:normal;font-size:14px;color:var(--ink-3);font-weight:500;margin-left:4px;}
.metric-card .k{margin-top:6px;font-size:14px;color:var(--ink-3);line-height:1.7;}

/* ============ 深色区块 ============ */
.dark-panel{
  background:#10243B;
  color:#fff;
  border-radius:16px;
  padding:48px;
  position:relative;
  overflow:hidden;
}
.dark-panel::after{
  content:"";
  position:absolute;
  right:-60px;bottom:-80px;
  width:240px;height:240px;
  border:1px solid rgba(255,255,255,.10);
  border-radius:48px;
  transform:rotate(18deg);
}
.dark-panel .h2{color:#fff;max-width:560px;}
.dark-panel p.sub{margin-top:12px;font-size:15px;color:rgba(255,255,255,.72);max-width:640px;}
.dark-grid{
  position:relative;
  margin-top:32px;
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;
}
.dark-item{
  border:1px solid rgba(255,255,255,.14);
  border-radius:var(--r-card);
  padding:20px;
  background:rgba(255,255,255,.03);
  transition:background .22s ease,border-color .22s ease,transform .22s ease;
}
.dark-item:hover{background:rgba(255,255,255,.07);border-color:rgba(255,255,255,.28);transform:translateY(-2px);}
.dark-item .n{
  font-size:13px;font-weight:700;color:var(--accent);
  letter-spacing:.08em;margin-bottom:10px;
}
.dark-item h4{color:#fff;font-size:17px;font-weight:600;margin-bottom:8px;}
.dark-item p{font-size:14px;color:rgba(255,255,255,.68);line-height:1.7;}

/* ============ 表格 ============ */
.table-wrap{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  overflow:hidden;
}
table.data{font-size:14px;}
table.data thead th{
  background:var(--surface-2);
  color:var(--ink-2);
  font-weight:600;
  font-size:13px;
  text-align:left;
  padding:14px 20px;
  border-bottom:1px solid var(--line);
  white-space:nowrap;
}
table.data tbody td{
  padding:16px 20px;
  border-bottom:1px solid var(--line);
  color:var(--ink-2);
  line-height:1.7;
  vertical-align:top;
}
table.data tbody tr:last-child td{border-bottom:0;}
table.data tbody tr{transition:background .2s ease;}
table.data tbody tr:hover{background:#FAFCFE;}
table.data td strong{color:var(--ink);font-weight:600;}

/* ============ FAQ ============ */
.faq-list{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  overflow:hidden;
}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:last-child{border-bottom:0;}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;
  text-align:left;
  font-size:17px;font-weight:600;color:var(--ink);
  position:relative;
  transition:background .2s ease,color .2s ease;
}
.faq-q::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;
  background:var(--brand);border-radius:0 2px 2px 0;
  opacity:0;transition:opacity .2s ease;
}
.faq-q:hover{background:#FAFCFE;color:var(--brand);}
.faq-q .caret{
  flex-shrink:0;
  width:22px;height:22px;
  display:flex;align-items:center;justify-content:center;
  color:var(--ink-3);
  transition:transform .22s ease,color .22s ease;
}
.faq-item.is-open .faq-q::before{opacity:1;}
.faq-item.is-open .faq-q{color:var(--brand);}
.faq-item.is-open .faq-q .caret{transform:rotate(180deg);color:var(--brand);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .28s ease;
}
.faq-a-inner{
  padding:0 24px 22px 24px;
  font-size:15px;
  color:var(--ink-2);
  line-height:1.85;
  background:var(--surface-2);
}
.faq-a-inner p{padding-top:16px;max-width:760px;}

/* ============ 相关入口 ============ */
.entry-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:20px;
}
.entry-card{
  display:flex;
  flex-direction:column;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:24px;
  box-shadow:var(--sh-1);
  transition:box-shadow .22s ease,transform .22s ease,border-color .22s ease;
}
.entry-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:#CFDBE8;}
.entry-card .chip{align-self:flex-start;margin-bottom:14px;}
.entry-card h3{font-size:18px;font-weight:600;line-height:1.45;margin-bottom:8px;transition:color .2s ease;}
.entry-card:hover h3{color:var(--brand);}
.entry-card p{font-size:14px;color:var(--ink-3);line-height:1.75;margin-bottom:18px;}
.entry-card .link-more{margin-top:auto;}

/* ============ 底部 CTA ============ */
.cta-band{
  background:var(--brand-d);
  border-radius:16px;
  padding:56px 40px;
  text-align:center;
  color:#fff;
  position:relative;
  overflow:hidden;
}
.cta-band::after{
  content:"";
  position:absolute;
  left:-70px;top:-70px;
  width:220px;height:220px;
  border:1px solid rgba(255,255,255,.12);
  border-radius:44px;
  transform:rotate(20deg);
  pointer-events:none;
}
.cta-band .h2{color:#fff;position:relative;}
.cta-band p{
  position:relative;
  margin:14px auto 28px;
  max-width:600px;
  font-size:15px;
  color:rgba(255,255,255,.78);
  line-height:1.8;
}
.cta-band .btn{position:relative;}

/* ============ 页脚 ============ */
.site-footer{
  background:#10243B;
  color:rgba(255,255,255,.72);
  font-size:14px;
  padding:64px 0 0;
  margin-top:var(--sec);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.3fr;
  gap:40px;
  padding-bottom:44px;
}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer-brand .brand-mark{width:34px;height:34px;background:linear-gradient(180deg,#2C72BE 0%,#1F5FA9 100%);}
.footer-brand .brand-mark::after{inset:10px;}
.footer-brand .brand-text{line-height:1.25;}
.footer-brand .brand-name{color:#fff;font-size:16px;font-weight:700;}
.footer-brand .brand-sub{color:rgba(255,255,255,.5);font-size:12px;}
.footer-about p{line-height:1.8;color:rgba(255,255,255,.66);max-width:340px;}
.footer-contact{margin-top:14px;font-size:13px;color:rgba(255,255,255,.5);line-height:1.9;}
.site-footer h4{
  color:#fff;
  font-size:15px;
  font-weight:600;
  margin-bottom:16px;
}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{
  color:rgba(255,255,255,.66);
  font-size:14px;
  transition:color .2s ease,transform .2s ease;
  display:inline-block;
}
.footer-links a:hover{color:#fff;transform:translateX(2px);}
.sub-form{display:flex;flex-direction:column;gap:14px;}
.sub-form label{font-size:13px;color:rgba(255,255,255,.6);line-height:1.6;}
.sub-form input{
  height:48px;
  padding:0 14px;
  border-radius:var(--r-btn);
  border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.06);
  color:#fff;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.sub-form input::placeholder{color:rgba(255,255,255,.42);}
.sub-form input:focus{
  outline:none;
  border-color:var(--brand);
  background:rgba(255,255,255,.1);
  box-shadow:0 0 0 3px rgba(31,95,169,.28);
}
.sub-form .btn{width:100%;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 26px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:13px;
  color:rgba(255,255,255,.5);
  flex-wrap:wrap;
}

/* ============ 底部固定转化条 ============ */
.float-cta{
  position:fixed;
  right:24px;
  bottom:24px;
  z-index:70;
  display:flex;
  align-items:center;
  gap:16px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-3);
  padding:14px 16px;
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .24s ease,transform .24s ease,visibility .24s ease;
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta .txt{font-size:14px;color:var(--ink-2);line-height:1.5;font-weight:500;}
.float-cta .txt span{display:block;font-size:12px;color:var(--ink-3);font-weight:400;}

/* ============ 骨架与空态 ============ */
.skeleton{
  background:var(--surface-2);
  border-radius:8px;
  position:relative;
  overflow:hidden;
}
.skeleton::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(255,255,255,0) 0%,rgba(255,255,255,.7) 50%,rgba(255,255,255,0) 100%);
  animation:shine 1.4s infinite;
}
@keyframes shine{
  from{transform:translateX(-100%);}
  to{transform:translateX(100%);}
}
.empty-state{
  display:flex;flex-direction:column;align-items:center;gap:12px;
  text-align:center;
  padding:48px 24px;
  background:var(--surface-2);
  border:1px dashed var(--line);
  border-radius:var(--r-card);
  color:var(--ink-3);
  font-size:14px;
}
.empty-state .ico{
  width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line);
  background:var(--surface);
  display:flex;align-items:center;justify-content:center;
  color:var(--brand);
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  :root{--container:960px;--sec:80px;}
  .nav a{padding:8px 11px;font-size:13.5px;}
}
@media (max-width:1099px){
  .nav{display:none;}
  .header-cta{display:none;}
  .nav-toggle{display:inline-flex;}
}
@media (max-width:991px){
  :root{--sec:72px;}
  .container{padding:0 20px;}
  .guide-grid{grid-template-columns:1fr;gap:36px;}
  .guide-aside{position:static;}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px 0;}
  .step::before{display:none;}
  .step{padding:0 16px 0 0;}
  .entry-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .dark-grid{grid-template-columns:1fr 1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-band{padding:44px 28px;}
  .dark-panel{padding:36px 28px;}
}
@media (max-width:767px){
  :root{--sec:54px;}
  body{padding-bottom:calc(64px + env(safe-area-inset-bottom));}
  .container{padding:0 16px;}
  .topbar{display:none;}
  .header-inner{min-height:64px;gap:12px;}
  .brand-name{font-size:15px;}
  .brand-sub{display:none;}
  .page-head{padding:30px 0 30px;}
  .head-stat{flex:1 1 100%;border-right:0;border-bottom:1px solid var(--line);padding:14px 18px;}
  .head-stat:last-child{border-bottom:0;}
  .point-grid{grid-template-columns:1fr;}
  .metric-row{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;gap:22px;}
  .entry-grid{grid-template-columns:1fr;}
  .dark-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .table-wrap{overflow-x:auto;}
  table.data{min-width:560px;}
  .sec-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:26px;}
  .faq-q{font-size:16px;padding:18px 18px;}
  .faq-a-inner{padding:0 18px 20px;}
  .cta-band{padding:36px 20px;border-radius:14px;}
  .dark-panel{border-radius:14px;}
  .float-cta{
    left:0;right:0;bottom:0;
    border-radius:0;
    border-left:0;border-right:0;border-bottom:0;
    border-top:1px solid var(--line);
    padding:10px 16px calc(10px + env(safe-area-inset-bottom));
    justify-content:space-between;
    gap:12px;
  }
  .float-cta .txt{font-size:13px;}
  .float-cta .txt span{display:none;}
  .float-cta .btn{padding:10px 18px;font-size:14px;}
  .site-footer{margin-top:var(--sec);padding-top:48px;}
}
@media (max-width:480px){
  .h1{font-size:26px;}
  .h2{font-size:22px;}
  .lead{font-size:15px;}
  .btn{width:100%;}
  .btn-sm{width:auto;}
  .sec-head .h2{font-size:21px;}
  .cta-band{padding:30px 16px;}
  .point-card,.metric-card,.entry-card{padding:18px;}
  .header-inner .brand-mark{width:32px;height:32px;}
  .header-inner .brand-mark::after{inset:10px;}
}

/* roulang page: category2 */
:root{
  --brand:#1F5FA9;
  --brand-d:#143F73;
  --brand-l:#E8F0FB;
  --accent:#E2703A;
  --accent-d:#C75E2C;
  --accent-l:#FBEDE5;
  --support:#2E8B7A;
  --support-l:#E4F2EE;
  --bg:#F5F7FA;
  --surface:#FFFFFF;
  --surface-2:#EEF2F7;
  --ink:#141C26;
  --ink-2:#4A5568;
  --ink-3:#8A94A3;
  --line:#DDE4EC;
  --sh-1:0 1px 2px rgba(20,45,80,.06);
  --sh-2:0 8px 24px rgba(20,45,80,.08);
  --sh-3:0 16px 40px rgba(20,45,80,.12);
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --cw:1200px;
  --t:220ms ease;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
img{max-width:100%;display:block;}
a{color:var(--brand);text-decoration:none;transition:color var(--t),background-color var(--t),border-color var(--t),transform var(--t),box-shadow var(--t);}
a:hover{color:var(--brand-d);}
button{font-family:inherit;font-size:inherit;cursor:pointer;}
input{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.num{font-variant-numeric:tabular-nums;}
.container{width:100%;max-width:var(--cw);margin:0 auto;padding:0 24px;}
.section{padding:88px 0;}
.section-tight{padding:64px 0;}
.section-alt{background:var(--surface);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;}
.section-head .eyebrow{margin-bottom:10px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.06em;color:var(--brand);
  font-weight:600;
}
.eyebrow::before{content:"";width:3px;height:14px;background:var(--brand);border-radius:2px;display:inline-block;}
h1{font-size:clamp(30px,3.4vw,44px);font-weight:700;line-height:1.25;letter-spacing:-.01em;}
h2{font-size:clamp(24px,2.4vw,32px);font-weight:700;line-height:1.3;}
h3{font-size:20px;font-weight:600;line-height:1.45;}
h4{font-size:17px;font-weight:600;line-height:1.5;}
.lede{font-size:16px;color:var(--ink-2);max-width:760px;}
.meta{font-size:13px;line-height:1.6;color:var(--ink-3);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1.2;
  border:1px solid transparent;background:transparent;
  transition:background-color var(--t),color var(--t),border-color var(--t),box-shadow var(--t),transform var(--t);
  white-space:nowrap;
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:var(--sh-1);}
.btn-primary:hover{background:var(--accent-d);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-primary:active{transform:translateY(0);box-shadow:var(--sh-1);}
.btn-ghost{border-color:var(--brand);color:var(--brand);}
.btn-ghost:hover{background:var(--brand-l);color:var(--brand-d);}
.btn-light{background:#fff;color:var(--brand-d);}
.btn-light:hover{background:#F2F6FC;color:var(--brand-d);transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-sm{padding:9px 16px;font-size:14px;}
.btn-block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none;}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand);}
.link-arrow::after{content:"→";transition:transform var(--t);}
.link-arrow:hover{color:var(--brand-d);}
.link-arrow:hover::after{transform:translateX(3px);}
.chip{
  display:inline-flex;align-items:center;
  height:28px;padding:0 12px;border-radius:var(--r-pill);
  font-size:13px;font-weight:600;
  background:var(--brand-l);color:var(--brand);
}
.badge{
  display:inline-flex;align-items:center;
  height:24px;padding:0 10px;border-radius:var(--r-pill);
  font-size:13px;font-weight:600;
  background:var(--support-l);color:#1F6A5C;
}
.badge-accent{background:var(--accent-l);color:#A9501F;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:#fff;border-bottom:1px solid var(--line);
  transition:box-shadow var(--t);
}
.site-header.is-scrolled{box-shadow:var(--sh-2);}
.header-inner{display:flex;align-items:center;gap:18px;min-height:68px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--ink);}
.brand:hover{color:var(--ink);}
.brand-mark{
  position:relative;width:30px;height:30px;border-radius:9px;
  background:var(--brand);flex:0 0 auto;
}
.brand-mark::after{
  content:"";position:absolute;left:9px;top:9px;width:12px;height:12px;
  border:2px solid #fff;border-radius:3px;
}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-name{font-size:17px;font-weight:700;letter-spacing:-.01em;}
.brand-sub{font-size:12px;color:var(--ink-3);}
.nav{display:flex;align-items:center;gap:4px;margin-left:auto;}
.nav a{
  position:relative;
  padding:9px 14px;border-radius:var(--r-pill);
  font-size:14px;color:var(--ink-2);background:transparent;
}
.nav a:hover{background:var(--surface-2);color:var(--ink);}
.nav a.is-active{background:var(--brand-l);color:var(--brand);font-weight:600;}
.nav a.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:var(--brand);border-radius:2px;
}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:var(--r-btn);
  border:1px solid var(--line);background:#fff;
  align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.nav-toggle span{width:16px;height:2px;background:var(--ink);border-radius:2px;display:block;transition:background-color var(--t);}
.nav-toggle:hover{border-color:var(--brand);}
.nav-toggle:hover span{background:var(--brand);}
.nav-backdrop{
  position:fixed;inset:0;background:rgba(20,28,38,.4);z-index:78;
  opacity:0;pointer-events:none;transition:opacity var(--t);
}
.nav-backdrop.is-open{opacity:1;pointer-events:auto;}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  background:var(--surface-2);
  border-bottom:1px solid var(--line);
  padding:48px 0 44px;
}
.page-hero::after{
  content:"";position:absolute;right:-80px;bottom:-120px;
  width:360px;height:360px;border-radius:50%;
  border:1px solid rgba(31,95,169,.14);
}
.page-hero::before{
  content:"";position:absolute;right:120px;top:-90px;
  width:200px;height:200px;border-radius:24px;
  background:rgba(31,95,169,.05);
}
.breadcrumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:13px;color:var(--ink-3);margin-bottom:18px;
}
.breadcrumb a{color:var(--ink-3);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:var(--line);}
.breadcrumb .current{color:var(--ink-2);}
.page-hero h1{max-width:820px;margin:14px 0 14px;}
.page-hero .lede{font-size:17px;color:var(--ink-2);}
.stat-strip{
  position:relative;z-index:1;
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;margin-top:30px;padding-top:24px;
  border-top:1px solid var(--line);
  max-width:760px;
}
.stat{padding-left:18px;border-left:1px solid var(--line);}
.stat:first-child{border-left:0;padding-left:0;}
.stat-num{font-size:28px;font-weight:700;color:var(--brand);line-height:1.2;font-variant-numeric:tabular-nums;}
.stat-label{font-size:13px;color:var(--ink-3);margin-top:4px;}

/* ---------- steps ---------- */
.steps-wrap{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  padding:32px 28px;
}
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;}
.step{position:relative;padding:0 14px;text-align:center;}
.step::after{
  content:"";position:absolute;top:22px;left:calc(50% + 30px);right:calc(-50% + 30px);
  height:1px;background:var(--line);
}
.step:last-child::after{display:none;}
.step-num{
  position:relative;z-index:1;
  width:44px;height:44px;margin:0 auto 14px;
  border-radius:50%;border:1px solid var(--line);background:#fff;
  display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:700;color:var(--ink-3);
  font-variant-numeric:tabular-nums;
  transition:background-color var(--t),color var(--t),border-color var(--t),box-shadow var(--t);
}
.step.is-active .step-num{
  background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:var(--sh-2);
}
.step h3{font-size:16px;margin-bottom:6px;}
.step p{font-size:13px;line-height:1.7;color:var(--ink-3);}
.step.is-active h3{color:var(--brand);}

/* ---------- card matrix ---------- */
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;}
.card{
  position:relative;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  overflow:hidden;
  transition:box-shadow var(--t),transform var(--t),border-color var(--t);
}
.card::before{
  content:"";position:absolute;left:0;top:0;height:2px;width:0;
  background:var(--brand);transition:width var(--t);
}
.card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:#CFDAE7;}
.card:hover::before{width:100%;}
.card-media{aspect-ratio:16/9;overflow:hidden;background:var(--surface-2);}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform var(--t);}
.card:hover .card-media img{transform:translateY(-2px) scale(1.01);}
.card-body{padding:22px;}
.card-body h3{font-size:18px;margin-bottom:10px;transition:color var(--t);}
.card:hover .card-body h3{color:var(--brand);}
.card-body p{font-size:14px;line-height:1.8;color:var(--ink-2);margin-bottom:14px;}

/* ---------- compare table ---------- */
.table-wrap{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--sh-1);overflow:hidden;
}
.table-scroll{overflow-x:auto;}
table{width:100%;border-collapse:collapse;min-width:640px;}
thead th{
  background:var(--brand-l);color:var(--brand-d);
  font-size:14px;font-weight:600;text-align:left;
  padding:14px 20px;border-bottom:1px solid var(--line);white-space:nowrap;
}
tbody td{
  padding:16px 20px;font-size:14px;color:var(--ink-2);
  border-bottom:1px solid var(--line);vertical-align:top;
}
tbody tr:last-child td{border-bottom:0;}
tbody tr:hover td{background:#FAFCFE;}
tbody td:first-child{color:var(--ink);font-weight:600;}

/* ---------- update log ---------- */
.log-list{border-top:1px solid var(--line);margin-top:8px;}
.log-item{
  display:grid;grid-template-columns:120px 1fr;gap:20px;
  padding:18px 0;border-bottom:1px solid var(--line);
}
.log-item time{font-size:13px;color:var(--ink-3);font-variant-numeric:tabular-nums;}
.log-item p{font-size:14px;color:var(--ink-2);}

/* ---------- faq ---------- */
.faq{border-top:1px solid var(--line);max-width:900px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 0 20px 0;
  font-size:17px;font-weight:600;color:var(--ink);
  transition:color var(--t),padding var(--t),border-color var(--t);
  border-left:3px solid transparent;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--brand);}
.faq-item summary::after{
  content:"";flex:0 0 auto;width:10px;height:10px;
  border-right:2px solid var(--ink-3);border-bottom:2px solid var(--ink-3);
  transform:rotate(45deg);transition:transform var(--t),border-color var(--t);
  margin-right:4px;
}
.faq-item[open] summary{
  color:var(--brand);border-left-color:var(--brand);padding-left:16px;
}
.faq-item[open] summary::after{transform:rotate(-135deg);border-color:var(--brand);}
.faq-answer{
  background:var(--surface-2);border-radius:10px;
  padding:16px 20px;margin:0 0 20px 0;
  font-size:15px;color:var(--ink-2);
}
.faq-item[open] .faq-answer{margin-left:16px;}

/* ---------- related ---------- */
.related-card{
  display:flex;flex-direction:column;gap:10px;
  padding:22px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  transition:box-shadow var(--t),transform var(--t),border-color var(--t);
}
.related-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:#CFDAE7;}
.related-card .tag{font-size:13px;color:var(--support);font-weight:600;}
.related-card h3{font-size:17px;color:var(--ink);}
.related-card p{font-size:14px;color:var(--ink-2);}

/* ---------- cta band ---------- */
.cta-band{
  background:var(--brand-d);
  border-radius:16px;
  padding:52px 40px;
  text-align:center;color:#fff;
  box-shadow:var(--sh-3);
}
.cta-band h2{color:#fff;margin-bottom:12px;}
.cta-band p{color:rgba(255,255,255,.78);font-size:15px;max-width:620px;margin:0 auto 26px;}
.cta-actions{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;}
.btn-outline-light{border-color:rgba(255,255,255,.5);color:#fff;}
.btn-outline-light:hover{background:rgba(255,255,255,.12);color:#fff;border-color:#fff;}

/* ---------- footer ---------- */
.site-footer{background:#10243B;color:rgba(255,255,255,.72);margin-top:96px;}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;
  padding:64px 0 40px;
}
.site-footer h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-mark{background:#fff;}
.footer-brand .brand-mark::after{border-color:#10243B;}
.footer-brand .brand-name{color:#fff;font-size:17px;font-weight:700;}
.footer-brand .brand-sub{color:rgba(255,255,255,.5);font-size:12px;}
.footer-about p{font-size:14px;line-height:1.8;margin-bottom:16px;}
.footer-contact{font-size:13px;line-height:1.9;color:rgba(255,255,255,.55);}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{font-size:14px;color:rgba(255,255,255,.72);}
.footer-links a:hover{color:#fff;transform:translateX(2px);}
.site-footer .meta{color:rgba(255,255,255,.6);}
.sub-form{display:flex;flex-direction:column;gap:12px;}
.sub-form input{
  height:48px;padding:0 14px;border-radius:var(--r-btn);
  border:1px solid rgba(255,255,255,.22);
  background:rgba(255,255,255,.06);color:#fff;font-size:14px;
  transition:border-color var(--t),box-shadow var(--t),background-color var(--t);
}
.sub-form input::placeholder{color:rgba(255,255,255,.45);}
.sub-form input:focus{
  outline:none;border-color:#7FA8DA;background:rgba(255,255,255,.1);
  box-shadow:0 0 0 3px rgba(31,95,169,.35);
}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 0 28px;border-top:1px solid rgba(255,255,255,.12);
  font-size:13px;color:rgba(255,255,255,.55);
}

/* ---------- floating bar ---------- */
.floating-bar{
  position:fixed;right:24px;bottom:24px;z-index:70;
  display:flex;align-items:center;gap:16px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-3);padding:14px 16px;
  opacity:0;transform:translateY(10px);pointer-events:none;
  transition:opacity var(--t),transform var(--t);
}
.floating-bar.is-visible{opacity:1;transform:translateY(0);pointer-events:auto;}
.floating-bar .fb-text{font-size:14px;color:var(--ink-2);}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .container{max-width:980px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px;}
}
@media (max-width:1023px){
  .section{padding:72px 0;}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr));}
  .grid-4{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:991px){
  .header-inner{gap:12px;}
  .nav{
    position:fixed;top:0;right:0;height:100%;width:290px;
    margin-left:0;padding:88px 20px 28px;
    background:#fff;box-shadow:var(--sh-3);
    display:grid;grid-template-columns:1fr;align-content:start;gap:8px;
    transform:translateX(100%);transition:transform var(--t);
    overflow-y:auto;z-index:79;
  }
  .nav.is-open{transform:translateX(0);}
  .nav a{padding:12px 14px;font-size:15px;border:1px solid var(--line);border-radius:var(--r-btn);}
  .nav a.is-active::after{display:none;}
  .nav-toggle{display:inline-flex;}
  .header-actions .btn{display:none;}
  .grid-2{grid-template-columns:1fr;}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px 8px;}
  .step:nth-child(2)::after{display:none;}
  .cta-band{padding:44px 24px;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .section{padding:56px 0;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;}
  .page-hero{padding:34px 0 32px;}
  .stat-strip{grid-template-columns:1fr;gap:14px;}
  .stat{border-left:0;padding-left:0;border-top:1px solid var(--line);padding-top:12px;}
  .stat:first-child{border-top:0;padding-top:0;}
  .grid-3,.grid-4{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding:48px 0 32px;}
  .log-item{grid-template-columns:1fr;gap:6px;}
  .faq-item summary{font-size:16px;}
  .floating-bar{
    left:0;right:0;bottom:0;border-radius:0;border-left:0;border-right:0;border-bottom:0;
    justify-content:space-between;
    padding:10px 16px calc(10px + env(safe-area-inset-bottom));
    transform:translateY(100%);
  }
  .floating-bar.is-visible{transform:translateY(0);}
  body{padding-bottom:64px;}
}
@media (max-width:480px){
  h1{font-size:26px;}
  h2{font-size:22px;}
  .btn{width:100%;}
  .cta-actions{flex-direction:column;}
  .card-body{padding:18px;}
  .steps{grid-template-columns:1fr;}
  .step::after{display:none;}
}